Gene duplication and relaxation from selective constraints of GCYC genes correlated with various floral symmetry patterns in Asiatic Gesneriaceae tribe Trichosporeae.

ABSTRACT: Floral bilateral symmetry is one of the most important acquisitions in flower shape evolution in angiosperms. Members of Gesneriaceae possess predominantly zygomorphic flowers yet natural reversal to actinomorphy have independently evolved multiple times. The development of floral bilateral symmetry relies greatly on the gene CYCLOIDEA (CYC). Our reconstructed GCYC phylogeny indicated at least five GCYC duplication events occurred over the evolutionary history of Gesneriaceae. However, the patterns of GCYC expression following the duplications and the role of natural selection on GCYC copies in relation to floral symmetry remained largely unstudied. The Asiatic tribe Trichosporeae contains most reversals to actinomorphy. We thus investigated shifts in GCYC gene expression among selected zy

SUBMITTER: Hsin KT 

PROVIDER: S-EPMC6353098 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature